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  • Caidian District

Tucson (/ˈtuːsɒn, tuːˈsɒn/; Spanish: Tucson, O'odham: Cuk-Ṣon) is a city in and the county seat of Pima County, Arizona, United States, and is home to the University of Arizona. It is the second largest city in Arizona behind Phoenix, with a population of 542,629 in the 2020 United States census, while the population of the entire Tucson metropolitan statistical area (MSA) is 1,043,433. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA). Both Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border. Tucson is the 34th largest city and the 53rd largest metropolitan area in the United States (2014).

Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita south of the city, and South Tucson in an enclave south of downtown. Communities in the vicinity of Tucson (some within or overlapping the city limits) include Casas Adobes, Catalina Foothills, Flowing Wells, Midvale Park, Tanque Verde, Tortolita, and Vail. Towns outside the Tucson metro area include Benson to the southeast, Catalina and Oracle to the north, and Green Valley to the south.

Tucson was founded as a military fort by the Spanish when Hugo O'Conor authorized the construction of Presidio San Agustín del Tucsón in 1775. It was included in the state of Sonora after Mexico gained independence from the Spanish Empire in 1821. In 1853, the United States acquired a 29,670 square miles (76,840 km2) region of present-day southern Arizona and southwestern New Mexico from Mexico under the Gadsden Purchase. Tucson served as the capital of the Arizona Territory from 1867 to 1877. Tucson was Arizona's largest city by population during the territorial period and early statehood, until it was surpassed by Phoenix by 1920. Nevertheless, population growth remained strong during the late 20th century. In 2017, Tucson was the first American city to be designated a "City of Gastronomy" by UNESCO.

Caidian District, subordinate to Wuhan City, Hubei Province, is located in the western suburb of Wuhan City, located in the triangle zone of the confluence of the Han River and the Yangtze River, in the east of the Jianghan Plain, near the Han River in the north, and dependent on the lips and teeth of the East and West Lake District; facing the Tongshun River in the south, connected by mountains and rivers in Hannan District; bordering the Yangtze River in the east and facing Jiangxia District across the water; bordering Hanchuan City in the west; Hanyang District in the northeast; Xiantao City in the southwest. It is between 113o 41mm east longitude and 114o 13' north latitude, with a total area of 1093.57 square kilometers. By 2018, Caidian District had jurisdiction over 12 streets and 1 township, and had 4 management committees with a resident population of 466600, realizing a GDP of 47.607 billion yuan, of which the added value of the primary industry was 4.298 billion yuan.
Airport In Caidian District - Wuhan Tianhe International Airport
Wuhan Tianhe International Airport (Wuhan Tianhe International Airport, IATA: WUH, ICAO: ZHHH), located in Huangpi District, Wuhan City, Hubei Province, China, 25 kilometers away from the center of Wuhan, is the first 4F civil international airport in central China   , one of the eight major regional hub airports in China, an airport with international scheduled flights, and a first-class air port open to the outside world   . In January 2019, the airport began to implement a 144-hour transit visa-free policy.
The field was officially completed and open to navigation on April 15, 1995, named "Wuhan Tianhe Airport"; it was identified as an international airport in 2000; the second phase of the expansion project was completed in April 2008. The third-phase expansion project was substantially started in June 2013, passed the completion acceptance in June 2017, and passed the industry acceptance in August 2017 and put into use.  
As of August 2020, Wuhan Tianhe International Airport has 1 terminal building with a total area of ​​495,000 square meters; 2 runways with lengths of 3,400 meters and 3,600 meters respectively; a total of 117 seats, and an air cargo terminal of 56,042 square meters meters; it can meet the needs of annual passenger throughput of 35 million person-times, cargo and mail throughput of 440,000 tons, and aircraft take-off and landing of 404,000 sorties.   
In 2019, the passenger throughput of Wuhan Tianhe International Airport was 27.15 million, a year-on-year increase of 10.8%; the cargo and mail throughput was 243,000 tons, a year-on-year increase of 9.8%; the number of transportation movements was 203,000, a year-on-year increase of 8.2%.  
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